/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-05 Marco Riccardi - initial implementation
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.IElement;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLElement;

public abstract class JustifiedProposition extends AuxiliaryItem implements IElement  {
    private enum MySubclass {Now, IterEquality, Proposition, Justification,}

    public static boolean isJustifiedProposition(String className){
        boolean found = false;
        if (Justification.isJustification(className)) found = true;
        for (MySubclass mySubclass :MySubclass.values()){
            if (mySubclass.name().equals(className)){
                found = true;
                break;
            }
        }
        return found;
    }

    public static JustifiedProposition newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        XMLElement xmlElement = xmlElementList.peek();
        if (!isJustifiedProposition(xmlElement.getName())){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a subclass of JustifiedProposition", xmlElementList);
        }
        if (Justification.isJustification(xmlElement.getName())){
        	return Justification.newInstance(parentNode, xmlElementList);
        }
        MySubclass mySubclass = MySubclass.valueOf(xmlElement.getName());
        switch (mySubclass) {
        case IterEquality: return IterEquality.newInstance(parentNode, xmlElementList);
        case Now: return Now.newInstance(parentNode, xmlElementList);
        case Proposition: return Proposition.newInstance(parentNode, xmlElementList);
        default: throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a subclass of AuxiliaryItem", xmlElementList);
        }
    }

    public LinkedList<XMLElement> getXMLElementList() {
        if (this instanceof JustifiedProposition) {
            return ((JustifiedProposition) this).getXMLElementList();
        } else 
        if (this instanceof IterEquality) {
            return ((IterEquality) this).getXMLElementList();
        } else 
        if (this instanceof Now) {
            return ((Now) this).getXMLElementList();
        } else 
        if (this instanceof Proposition) {
            return ((Proposition) this).getXMLElementList();
        } else 
        return new LinkedList<XMLElement>();
    }
}
